On 31 January 2014 13:58, Michal Suchanek <hramr...@gmail.com> wrote: > Hello, > > Is this actually documented somewhere for u-boot? > > There is lots about writing to flash memories in the manual but MBR > coexistence does not seem to be covered. > > u-boot is not written as a file but in a fixed location on the card > where the i.MX6 looks for a bootloader. > > So you have on your SD card. > > | MBR - 1sector | 1 free sector (you get here with bs=1k seek=1) | > u-boot | some space | start of first partition 0 your files here | > > You should make your first partition start far enough that u-boot, its > environment (if any), etc can fit before it on the SD card. > > On 31 January 2014 10:56, JYOTI DUBEY <jyoti0...@gmail.com> wrote: >> I want to boot a fresh nitrogen6x board with uboot which I compiled >> recently.After a successful compilation I obtained u-boot.imx file which I >> wanted to bunn on my SD card for booting. >> I used "dd if=u-boot.imx of=/dev/sdb bs=1k seek=1" copy u-boot.imx file on >> the SD card which gave me the following output >> 327+0 records in >> 327+0 records out >> 334848 bytes (335 kB) copied, 0.00272321 s, 123 MB/s >>>>sync >> but actually nothing is getting Copied in the SD card. > > It's written above. 335k were copied.
However, nitrogen6x does not use the u-boot you just copied. It uses u-boot which is in its ROM. You can probably chainload your new u-boot or upgrade the u-boot in ROM but for booting form a SD card the u-boot in the ROM should work: http://boundarydevices.com/u-boot-on-i-mx6/ HTH Michal _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot